Given: Class A { } Class B { } Interface X { } Interface Y { } Which two definitions of class C are valid?

The correct answer is A. Class C extends A implements X { } E. Class C extends B implements X, Y { }. extends is for extending a class. implements is for implementing an interface. Java allows for a class to implement many interfaces.

Working with Inheritance

Question

Given:

Class A { } Class B { } Interface X { } Interface Y { } Which two definitions of class C are valid?

Options

AClass C extends A implements X { }
BClass C implements Y extends B { }
CClass C extends A, B { }
DClass C implements X, Y extends B { }
EClass C extends B implements X, Y { }

How the community answered

(39 responses)

A
95% (37)
B
3% (1)
D
3% (1)

Explanation

extends is for extending a class. implements is for implementing an interface. Java allows for a class to implement many interfaces.

Topics

#inheritance#interfaces#extends keyword#implements keyword

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